Richard pattison



(No Model.)

R. PATTISON.

. AIR DUGT. No. 565,499. Patented Aug. 11, 1896-.

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UNITED STATES PATENT OFFICE.

RICHARD PATTISON, OF YORK, N. Y., ASSIGNOR TO G. A. SUTER & (30., OF SAME PLACE.

AIR-DUCT.

SPECIFICATION forming part of Letters Patent No. 565,499, dated August 11, 1896.

' Application filed November 21, 1895. Serial No. 569,666. (No model.)

To all whom/it may concern.-

Be it known thatLRIcHARD PATTISON, a citizen of the United States, and a resident of New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Air-Ducts, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, in which similar letters of reference indicate corresponding parts.

This invention relates to improvements in air-ducts of the character adapted to conduct either hot or cold air from a source of supply to suitable flues adapted to communicate with different compartments of houses or other structures. Such ducts comprise a series of hollow sections composed of sheet metal and which are open at each end and are rectangular in cross-section, the object of the invention being to supply inexpensive and efficient means whereby these said sections may be connected together in series and in such a manner as to supply practically air-tight and securely-braced joints between said sections, whereby a continuous duct of any desired length may be provided.

The invention will be hereinafter fully described, and specifically set forth in the annexed claims.

0 In the accompanying drawings, forming part of this application, Figure 1 is a perspective View showing the several parts of my device disassembled. Fig. 2 is a perspective view showing two sections of a duct coupled to each other. Fig. 3 is a longitudinal section taken on a line no 00 of Fig. 2. Fig. 4 is a perspective view showing a modified means of bracing the slips employed in coupling the several sections of a duct to each other, and Figs. 5, 6, and 7 are cross-sections illustrating modified means for bending the braces of the slips.

In constructing air-ducts a plurality of elongated sections or boxes A are provided. These said sections are composed of sheet metal and are open at each end, and in order to produce a continuous duct they must be connected to each other. To supply means for connecting them, I provide slips B, which are bent into a shape approximating the letter S, the two loops thereof being flattened,

whereby recesses 19 and b are produced, which are adapted to engage, respectively, with the ends of the two sections to be coupled. These said slips are provided upon their outer loops with braces b which may be bent into any suitable shape, depending upon the amount of strength required, and in the modified cross-sectional views 5, 6, and 7 I have illustrated some of the different styles of bending the braces. The slips may be provided upon their inner loops with projecting tapering tongues 12 which are bent inwardly upon their outer edges in order to form guides for the sections to be coupled. The slips are always formed of a single piece of sheet metal.

In coupling two of the sections A together the section to the left, which leads from the source of air supply, is provided at its four corners with slits a, whereby tongues a are produced, which are bent outwardly. The section to the right is also slitted at its four corners, and the tongues a thereby produced are bent inwardly, whereby said section is provided with a tapering end which is adapted to engage the flaring end of the section to the left. To couple the said two sections, slips B are brought into engagement with the four tongues a of the section to the left, the recesses b of the outer loops of the said slips being forced over the said tongues a. The tapering mouth of the section to the right is then forced into engagement with the recesses b of the slips 13, whereby the two sections are coupled to each other.

In order to more securely hold the said sections together, a pin C,which is provided with a flattened elongated head 0, is driven through an aperture 0, which passes through all of the thicknesses of metal comprising the two sections and one of their longer slips. The head 0 of the pin 0 is then revolved and forced under the upper loop of the slip B, through which it passes, thus preventing said pin 0 from being accidentally removed and also preventing any lateral displacement of the sections.

To effectually close the slits a and to further strengthen the duct at the points of intersection between its sections, I provide an angular slip or brace D, which is supplied with a flange cl. This said slip is forced within the recesses 19 of two of the slips at the ends thereof, as illustrated in Fig. 2, whereby an air-tight joint is maintained at the corners and a finished appearance is given to the braces.

In the modified form of construction shown in Fig. 4 the braces b may be further strengthened by the addition of wires e, and the corners may be carried out by means of elbows e. In this case the angular braces D need not have projecting flanges d.

It will be seen by reference to the arrows in Fig. 3 that air being forced in the direction of said arrows will, owing to the resistance afforded by the shape of the slips B, pass downwardly around their curved -loops instead of being forced out, as is the case where the common slip composed of a flat strip of sheet metal is used. In the said common construction the slip, comprising a single flat strip of metal, is riveted to the inner surface of one of the sections of the duct and the opposing section is fitted over it, the 0bjection to this construction being that the slip warps and bends, whereby' escape of air between the sections is allowed at the joints.

In my construction it will be seen that I provide a practically air-tight duct, the several parts of which may be-readily assembled and rigidly held together.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. In an air-duct, the combination of a series of hollow four-walled sheet-metal sections, and a plurality of slips which are approximately S-shaped in cross-section and which have bent braces forming part of and projecting at an angle from their outer loops and tongues extending from and forming part of their inner loops, the said loops adapted to engage respectively with opposing ends of the said sections, and sliding angular cornerpieces, and nails with flattened elongated heads, which nails are adapted to be driven through the slips and the sections to which they are attached,whereby said sections and slips maybe securely held together; substantially as shown and described.

2. The combination with a plurality of slips which are approximately S-shaped in crosssection, and formed of single sheets of metal and have braces projecting at an angle from their outer loops and tongues extending from their inner loops; of a series of hollow fourwalled sections, the opposing ends of which sections engage respectively with recesses formed by flattening the loops of the said slips, whereby a continuous duct, adapted to conduct hot or cold airis produced; substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 18th day of November, 1895.

RICHARD PATTISON.

\Vitnesses:

M. G. MCCLEAN, .T. APPELBOOM. 

